I am an idiot, I know! 
My DH is in the army and is posted from April. Baby is due in July and I have decided to stay put until baby is born, partly as pregnancy is high risk and partly so my DC can finish the school year.
When I told one of my friends I was staying here she immediately said 'Oh, I'll be your birthing partner then!' and I didn't really answer one way or the other, I felt a bit awkward about it. Since then she has kept mentioning it and I keep trying to say things that will put her off, but she isn't taking the hints.
My Mum is coming over when I am 37 weeks (if I am still pregnant then) and the plan was she would come to the hospital with me and then come home again if DH arrived in time. I had planned to ask my friend if she could mind my DC for me.
I just don't think I'll feel comfortable enough to be able to relax and get on with it with my friend there. My last labour was with my twins at 23+5 weeks, and we lost both twins, 1 at 15 minutes old, 1 at 9 days old, so I am not sure how I'll react to being in labour again. Also, if possible I want baby put straight onto my tummy after she is born and want her left there until I have tried/been able to breastfeed her, which again, I don't feel comfortable about with my friend there.
There are a few other reasons I don't want her there, but I feel if I say no to her being my birthing parner I can't really ask her to look after my DC for me, so my Mum would have to stay with them and I would have to go to the hospital on my own. I would still prefer to be on my own than with my friend though.
How can I let her down gently?